It is very easy to create professional-looking, expanding and collapsing,
tree-like JavaScript menu in just a couple of steps with the help of either Art HTML Listing or
Advanced HTML TOC.
Both programs have enough capabilities to make your menu really cool and
functional in any browser that supports DHTML. You don't need to have any
programming skills in order to use them.

JavaScript menu created with Art HTML Listing

JavaScript menu created with Advanced HTML TOC

Benefits

Simple as 1-2-3.

No programming skills required.

Instant professional-looking result.

Work in any DHTML enabled browser, such as Internet Explorer 4+, Netscape
6+, etc.

Downgrades well. If browser doesn't support JavaScript or it is switched
off, menu tree is still usable.

Fully customizable. Output is generated in accordance with templates. You
can change everything in a template.